Measurement of Ultrasonic Attenuation in Material Surface Layer by Spectroscopic Technique with Ultrasonic Reflectivity Measurement
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概要
- 論文の詳細を見る
The attenuation of surface acoustic waves is a useful parameter for estimating grain size, porosity and microstructure, which are closely related to electrical and mechanical properties of materials. In the present paper, a novel method for the determination of ultrasonic attenuations in the surface layer of materials using an ultrasonic spectroscopic technique is proposed. The method is based on absolute measurement of the reflection coefficient of the materials and analysis of its spectral behavior. The attenuations are determined by detecting the frequency of least reflection and by estimating a locus of zero points of the reflection coefficients in the complex plane. An experiment with annealed carbon steel was demonstrated. The reflection coefficient calculated with the attenuations estimated by the present method indicated a frequency dependence similar to the experimental result. This reveals that the estimated attenuations are good approximations of the actual acoustic response of materials.
- 一般社団法人日本機械学会の論文
- 1995-07-15
著者
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KOGUCHI Hideo
Department of Mechanical Engineering, Nagaoka University of Technology
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IHARA Ikuo
Department of Mechanical Engineering, Nagoya, University of Technology
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AIZAWA Tatsuhiko
Department of Metallurgy, Faculty of Engineering, University of Tokyo
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KIHARA Junji
Department of Metallurgy, Faculty of Engineering, University of Tokyo
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Ihara Ikuo
Department Of Endodontics Pulp And Periapical Biology Tokyo Dental College
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Kihara Junji
Department Of Metallurgy
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Kihara Junji
Department Of Metallurgy University Of Tokyo
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Koguchi Hideo
Department Of Mechanical Engineering Nagaoka University Of Technology
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Aizawa Tatsuhiko
Department Of Materials Science And Engineering University Of Toronto
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Ihara Ikuo
Department of Mechanical Engineering, Nagaoka University of Technology
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